Title :
Metric processing in joint source-channel decoders applied to impulsive noise environments
Author :
Faber, T. ; Scholand, T. ; Bruck, G.H. ; Jung, P.
Author_Institution :
Dept. of Commun. Technol., Univ. Duisburg-Essen, Duisburg, Germany
Abstract :
Joint source-channel (JSC) decoding in impulsive noise environments, such as, e.g., power line and digital subscriber line communications, but also mobile radio scenarios, is examined. Four possible approaches to the a-priori metric processing in JSC decoders, avoiding potential numerical instabilities, are illustrated and compared with respect to the achievable performance.
Keywords :
combined source-channel coding; convolutional codes; error correction codes; impulse noise; iterative decoding; maximum likelihood decoding; turbo codes; variable length codes; Gaussian mixture distribution; Jacobian logarithm; a-priori metric processing; binary turbo code; convolutional code; error-resilient data compression; forward error correcting code; impulsive noise environments; joint source-channel decoders; log-likelihood ratio; maximum a-posteriori algorithm; mobile radio scenarios; numerical instabilities; residual source redundancy; symmetrical reversible variable length code;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20031114
